|
|
|
| PROCESS OF FORMATION OF CORROSION FILMS ON ALLOY 70Cu-30Ni IN SEAWATER |
| ZHU Xiaolong; LIN Leyun (General Research Institute for Nonferrous Metals; China Nonferrous Metals Industry Corporation; Beijing 100088); LEI Tingquan (Harbin Institute of Technology; Harbin 150001) |
|
Cite this article:
ZHU Xiaolong; LIN Leyun (General Research Institute for Nonferrous Metals; China Nonferrous Metals Industry Corporation; Beijing 100088); LEI Tingquan (Harbin Institute of Technology; Harbin 150001). PROCESS OF FORMATION OF CORROSION FILMS ON ALLOY 70Cu-30Ni IN SEAWATER. Acta Metall Sin, 1997, 33(12): 1256-1261.
|
|
|
Abstract The characteristics and composition changes of the corrosion films of alloy 70Cu-30Ni immersed in seawater for different times were investigated.The results show that there is a Ni-rich zone in the films, which becomes wider and higher in the degree of Ni enrichment with increasing the immersed time. The film rich in Ni serves as an anode so as to protect the matrix. For the change of the structure or composition or for inner stress making the film broken, cracks or trenches appear in the film immersed in seawater for long time.With the solution and scaling off of the outer layer,the cracks or trenches become convex lines. Because the concentration ratio Ni / Cu at the convex lines is higher than average ratio Ni/Cu in the zone between convex lines,the preferred dissolution of convex lines leads the surface of the film to smoothness.The carbon in the film increases with increasing immersion time and can be thought to be from seawater not from residual carbon films.
|
|
|
1IJsseling F P, Krouguan J M, Drolenga L J P. 5th International Congress on Marine Corrosion andFouling,Barcelona,1980: 146
2Gilbert P T.Mater Perform,1982;21:47
3Sanchez S R, Scgiffrin D J. Corros Sci, 1982; 22: 585
4Efird K D.Corrosion,1977;33:347
5Kato C,Castle J E,Ateya B C,Pickering H W.J Electrochem Soc,1980;127:1897
6Jsseling F P, Krouguan J M, Drolenga LJP. 5th International Congress on Marine Corrosion andFouling, Barcelona, 1980:146
7Castle J E, Patvizi M S, Corros Prev Control, 1986; 17: 1
8Kato C,Ateya B G,Castle J E,Pickering H W.J Electrochem Soc, 1980; 127: 1890
9Hack H P,Pickering H W.J Electrochem Soc,1991;138:690
10Blundy R G, Pryor M J. Corros Sci, 1972; 12: 65
11McGuire G E, Bacarella A L, Griess J C, Jr, Clausing R E, Hulett L D.J Electrochem Soc, 1978;125:1801
12KatoC,Pickering H W.J Electrochem Soc,1984;131:1219
13Zhu Xiaolong,Lin Leyun.Chin J Met Sci Technol, 1992;8: 192
14Efird K D,Lee T S.NACE National Conference.Houston,1978:24O |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
